It simply isn't working.  I'm a very experienced sim pilot with over 12 years flying behind me and I'm very used to flying add-ons with more complex FMC operations.  I've worked through the manuals, in case I was missing something, but once programmed and up in the air, nothing happens when I engage the autopilot.  Neither LNAV or VNAV have any effect on the flightpath and if I try to set a manual climb rate the window is just blank and again, no response.  I've uninstalled and re-installed twice, with the same results.  I don't believe I've missed anything but if anyone has had a similar problem and knows how to solve it, it would be appreciated.